assertThat(response.trailers()).isEqualTo(headersOf("t1", "v2"))
      assertThat(response.trailers()).isEqualTo(headersOf("t1", "v2")) // Idempotent.
    }
  }

  @Test
  fun trailersEmptyResponseBodyHttp1() {
    trailersEmptyResponseBody(Protocol.HTTP_1_1)
  }

  @Test
  fun trailersEmptyResponseBodyHttp2() {
    trailersEmptyResponseBody(Protocol.HTTP_2)
  }